Did tubal ligation but now i missed my periods this month have stomach cramps, headaches and nausea what could be wrong with me?

Irregular periods: Irregular menstrual periods are common. The fluctuations of estrogen and progesterone can be easily affected by pregnancy, stress, weight gain/loss, thyroid problems, and uterine issues such as adenomyosis or fibroids. Talk to your Dr about your irregular periods and what testing can be done to determine the cause. It is almost impossible to get pregnant after tubal ligation.